He saw the Prophet ﷺ raise his hands when he bowed, and when he raised his head from bowing, until they were in level with the highest part of his ears. (Using translation from Nasāʾī 1056)  

أَنَّهُ رَأَى النَّبِيَّ ﷺ يَرْفَعُ يَدَيْهِ إِذَا رَكَعَ وَإِذَا رَفَعَ رَأْسَهُ مِنَ الرُّكُوعِ حَتَّى يُحَاذِي بِهِمَا فُرُوعَ أُذُنَيْهِ